1 can cream of mushroom soup
1/2 c. water
1 can tuna
1 med. onion, sliced
1 (3 oz.) can chow mein noodles

Heat soup and water, do not boil. Cook celery and onion until tender. To the warm soup and water, toss in other ingredients and 1 cup of noodles. Place in ungreased casserole. Put remaining noodles over top. Bake at 375 degrees for 15 minutes.